Clinicians collect umbilical cord blood and tissue after birth for medical use....

https://mill-wiki.win/index.php/Why_Do_Cord_Blood_Transplants_Tolerate_More_HLA_Mismatch%3F_A_Clinical_Perspective

Clinicians collect umbilical cord blood and tissue after birth for medical use. Cord blood yields hematopoietic cells for transplants, while cord tissue provides mesenchymal cells for repair. Immediate collection preserves vital cell viability.